In order to investigate the flow-induced vibration in the impeller clearance of centrifugal pump, and make the rotordynamic prediction of the centrifugal pump rotor system, a rotordynamic force model is established which is indispensable to the impeller-rotor system dynamics analysis. The coefficient in the dynamic force model is solved by quasi-steady CFD solution. Multiple quasi-steady solutions of an eccentric three-dimensional model at a series of relative spin velocity yield the rotordynamic forces at different whirl frequency ratios, and a second-order least-square fitting of the rotordynamic forces generates the skew-symmetric stiffness, damping, and mass matrices. Based on the work, the finite element method is applied to establish the model of turbo pump impeller-rotor system. The phenomenon of the fluid oscillation and some typical features are explained from the perspective of oscillation fluid mechanics. The results show complicated frequency characteristics presents in the turbo pump rotor vibration due to the exciting forces generated by shroud leakage flows.
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5451-8
PROCEEDINGS PAPER
Characteristics of Centrifugal Pump Rotor System Under Exciting Forces Generated by Shroud Leakage Flows
Quan-zhong Liu,
Quan-zhong Liu
Harbin Institute of Technology, Harbin, China
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Ru-zhi Gong,
Ru-zhi Gong
Harbin Institute of Technology, Harbin, China
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Hong-jie Wang,
Hong-jie Wang
Harbin Institute of Technology, Harbin, China
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Yang Yao
Yang Yao
Harbin Institute of Technology, Harbin, China
Search for other works by this author on:
Quan-zhong Liu
Harbin Institute of Technology, Harbin, China
Ru-zhi Gong
Harbin Institute of Technology, Harbin, China
Hong-jie Wang
Harbin Institute of Technology, Harbin, China
Yang Yao
Harbin Institute of Technology, Harbin, China
Paper No:
FEDSM-ICNMM2010-30285, pp. 485-491; 7 pages
Published Online:
March 1, 2011
Citation
Liu, Q, Gong, R, Wang, H, & Yao, Y. "Characteristics of Centrifugal Pump Rotor System Under Exciting Forces Generated by Shroud Leakage Flows." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 7th International Symposium on Fluid-Structure Interactions, Flow-Sound Interactions, and Flow-Induced Vibration and Noise: Volume 3, Parts A and B. Montreal, Quebec, Canada. August 1–5, 2010. pp. 485-491. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-30285
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